I disagree. Reunification would be an unmitigated disaster for South Korea.
I'm not sure what you are getting at in the context of the article. After all, virtually the entire thing dealt with this issue in some depth, and I can't tell what you are trying to add.
Are you sugggesting that the South can move their factories to the North, or are you suggesting relocating North Koreans to the South to work in existing factories?
Neither is unthinkable, but either would ential all the problems outlined in the article.
You may be thinking along the lines of TigerLikesRooster who believes that it might be possible to encourage economic development in the North without precipitating the kind of social unrest that a political loosening would bring.
I don't think that's possible unless the South is willing to simply give money to the North for the Northern elites to use (invest or spend) as they will. If the South wants to control their investment, that means Southern managers in the North, it means inevitable, growing and profoundly subversive social contacts. The cascade of events would likely follow exactly the scenario outlines by Lankov.
Meanwhile, the South continues in its eidetic state, caught between sleep and wakefulness, and ever more unrealistic policies. And alienating everyone that it ought to value along the way.